Canvas-handling mechanism



Oct, 15, 1929. E. E. EVANS 1,732,191

CANVAS HANDLING MECHANISM Filed March 29, 1927 2 Sheets-Sheet 1INVENTOR. [RNESTE EV/WS A TTORNE Y.

'Oct. 15, 1929. E. E. EVANS CANVAS HANDLING MECHANISM Filed March 29,1927 2 Sheets-Sheet INVENTOR. [ff/V55 T E. fVA/VS BY n ATTORNEY.

$ with my device.

Patented Oct. 15, 1929 UNITED STATES ERNEST EUGENE EVANS, OF RIVERSIDE,CALIFORNIA CANVAS-HANDLING MECHANISM Application filed March 29', 1927.Serial No. 179,200.

This invention relates to mechanisms forv handling tents or tarpaulins.

The general object of this invention is to provide a device forconveying and erecting canvas covers such as are used for covering treesfor fumigating purposes.

A specific object of my invention is to provide a device of the classdescribed whereby a plurality of covers may be placed and moved. Afurther object of my invention is to provide adjustable means forhandling tree covers.

Other objects and advantages of this invention will be apparent from thefollowing description taken in connection with the aecom-. panyingdrawings wherein:

Fig. 1 is a side elevation of a motor truck showing my invention appliedthereto.

Fig. 2 is an enlarged plan section of the device taken on line 22 ofFig. 1.

Fig. 3 is an enlarged vertical central section of the device taken online 33 of Fig. 1. Fig. 4 is an enlarged fragmentary section taken online H of Fig. 2 showing the auxiliary power connection with the crankshaft of the vehicle motor. i Fig. 5 is an enlarged vertical centralsection through the rear davit showing the same I turned to aninoperative position.

Fig. 6 is a plan view of the device on a reduced scale showing thedevice positionedbetween two rows of trees and about to hoist a pair ofcovers therefrom.

Fig. 7 is a View similar to Fig. 5 showing the device as havingtransferred a pair of covers from one pair of trees to another.

Fig. 8 is a perspective view of a circular cover which may be employedin connection Fig. 9 is a plan view of a canvas tarpaulin also adaptedto be used as a cover. Referring to the drawings by reference charactersI have indicated my improved cover handler generally at 10. The deviceas indicated comprises a truckor vehicle 11 of any desired type to thechassis frame 12 of which I secure a frame 13. The vehicle 11 includesfront steering wheels 14 and rear 9 drive wheels 15 which are adapted tobe driven through the medium of a propeller shaft 16 and its variousaccessories by an engine 17. Adjacent each end of the frame 13 I providea davit 18. These davits are shown as exactly similar in structure andare each adapted to turn about their vehicle center.

As shown in Fig. 5 a single davit 18 comprises a hollow vertical tubularmember 19 bent at the top at right angles to form a horizontal arm 20.The member 19 is positioned in a hollow stanchion 21 and adapted to beshifted vertically therein to raise and lower the arm 20. The member 19is adapted to be retained in various vertical positions by pro viding onthe stanchion 21 an enlarged circular boss 22 having therein a set screw23 adapted to engage any one of a plurality of apertures 24 in themember 19.

' The stanchion 21 is adapted to be supported by a bottom bearing 25secured to a transverse angle 26 of the frame 13. Adjacent the top ofthe frame 13 I provide for the stanchion 21 a positioning bearing 27secured to a transverse channel 28 ofthe frame and intermediate thebearing 25 and the bearing 27 I provide another positioning bearing 29'secured to another transverse angle 30 ofthe frame 13. The stanchion 21is adapted to turn about its vertical axis in the bearings be turned byracks 33 which engage the gears on opposite sides and are secured to arod 34. I

The rod 34 may be supported in anydesired manner as by transverse bars35 and retained in contact with the transverse bars by bridges 36. Therod 34: is adapted to be reciprocated by a disk 38 to which it is con-'nected by a link 39. Upon rotation of the disk 38 the rod 34 will bereciprocated backward and forward thus causing each of the davits 18 toswing from one side to the other as shown in Fig. 7.

The disk 38 may be supported on a transverse bar 35 and is adapted to bedriven from a shaft 41. The shaft 41 is driven through the medium of aclutch mechanism 42 from another shaft 43 which is in turn driven by aworm wheel 44. The clutch 42 may be of any desired type and may beactuated by a pivoted arm 42 having a handle 42 thereon adjacent thevehicle operators compartment (see Fig. 1).

The worm wheel 44 is driven by a worm 45 mounted on a shaft 46 which is"diiven by a bevel gear 47 secured thereto. The bevel gear 47 mesheswith another bevel "gear 48 secured to a shaft '49 which is driven froma bevel'gear 50. The bevel gear50 meshes with another bevel gear "51secured "to a longitudinally extending shaft- 52 which has securedthereto-at its forward end a bevel gear 53v (see Figs. 2 and 4). Thisbevel gear 53 meshes with another bevel gear 54 secured to a shaft 55.The shaft 55 is adapted to be driven through the 'medium of "a clutchmechanism 56 by a worm wheel 57. The clutch mechanism 56 may beof anydesired type and may be actuated by'a pivoted crank arm 56 connected bya rod 56 to a hand lever 56 adjacent the vehicle operators compartment(see Fig. 2). The worm wheel 57 meshes with a worm 58 secured to theshaft 59 of the vehicle engine 17.

I For hoisting the covers I provide a pair of drums '60 and 61 which areadapted to be rotated through the medium of a clutch mechanism 62 by aworm wheel 63. The worm wheel 63 meshes with a. worm 64 secured to theshaft 52. The clutch mechanism.

side of the tubular member 19 of the davits 18 (see Fig.5). The freeends: of the cables 68 and 69 may be provided with any suitable type ofgrasping means such as a snap "hook.

75. Adjacent the outer 'end of the horizontal arms 20 of each davit Iprovide a pulley 76 and adj acent the juncture of the arms 20 and thevertical member 19 I may provide "guide pulleys 77 and 78. j

In the operation my device 10 is positioned as'shown in Fig. 6approximately inthe center between four trees indicated atj80, 81,82 and88. The'covers indicated at 84 and 8.5

.are hoisted up by the cables 68 and 69 and lowered over the trees 80and 81 and then the fumigating operation may take place. Afterfumigating the trees 80 and 81 the covers 84 V and 85 are again hoistedby the cables 68 and the time required for fumigating a whole orchard.

In Fig. 8 Ihave (shown and indicated at 87 one type of cover which maybe used in con junction with any device for tree fumigation. The cover87 comprises-a cup shaped fabric body 88 "made of one or more pieces ofmaterial. The open end of this cover is preferably adapted to beretained in shape by ahoop 89 secured to the loweredge of the-cover inany desired manner. The hoop 89 is shown as provided with a plurality ofrinz'gs 90 to which are secured a plurality of cords 90 The cords 90pass through rings "96 on a hoop 90 securedi ritermediate the lengthof'the cover andare connected adjacent the top to a ring 90". With thisrigging the cover may be collapsed as-shown in 1 to lessen thelength'o'f the cover so that when placing it over a tree the davits 18will. not have to be raised the full length of the cover above the tree.This construction also allows of a stripping action whenthe cover isbeing re- 'moved from theitree, the cover being'pulled up from thebottom first.

In Fig. 9 I have shown and indicated at 91 a flat type of cover having afabric body portion 92. When Rising "this cover for fumigating a tree'it is merely draped over the tree. To facilitate handling this type ofcover I may secure to one edge of the fabric body 92a bar 93providedwith'a ring 94 by which the cover may behoisted.

From the foregoing description itwill be apparent that'I have providedanovel cover handling device wh'ich'is simple in construc tion, eas ofoperation, efli'cient in'use and greatly acilitates the 'handling of thefunny gatingcovers or tents.

What I claim'is':

1. A vehicle,'means to drive said vehicle, a davit acent the forward endof said vehicle, another davit'ad'jacent the rea'rend of said vehicle, awindlass, a pair of hoisting cables associated with said windlass andone of said pair of cables associated with said forward clavit and theother ofsaid cables associated with said rear davit, means for turningsaid davits about their vertical axes simultaneously.

2. A vehicle, means to drive said vehicle, a davit adjacent the forwardend of said vehicle, another davit adjacent the rear end of saidVehicle, a Windlass, a pair of hoisting cables associated with saidWindlass, one of said pair of cables associated with said forward davitand the other of said cables associated with said rear davit, means foroperating said Windlass from said vehicle drive means, a gear on each ofsaid davits, a rod extending longitudinally of said vehicle, racksadjacent each end of said rod engaging said gears on said davits, adisk, a link con necting said rod and said disk, and means for rotatingsaid disk from said vehicle drive means whereby said rod through themedium of said racks and said gears will turn said davits about theirvertical axes simultaneously.

3. A Vehicle, means to drive said vehicle, a davit adjacent the forwardend of said vehicle, another davit adjacent the rear end of saidvehicle, a Windlass, a pair of hoisting cables associated with saidWindlass and one of said pair of cables associated with said forwarddavit and the other of said cables associated with said rear davit,means for operating said Windlass from said vehicle drive means, a gearon each of said davits and means connecting each of said gears and saidvehicle drive means for turning said davits about their vertical axessimultaneously.

In testimony whereof, I hereunto aflix my signature.

ERNEST EU GENE EVANS.

